Index: src/GPSMap60CSx/CDevice.cpp
--- src/GPSMap60CSx/CDevice.cpp.orig
+++ src/GPSMap60CSx/CDevice.cpp
@@ -43,7 +43,7 @@ using namespace std;
 namespace GPSMap60CSx
 {
 
-    static const char _clrtbl[1024]= {
+    static const signed char _clrtbl[1024]= {
         0,0,0,0,32,0,0,0,65,0,0,0,106,0,0,0,-117,0,0,0,
         -76,0,0,0,-43,0,0,0,-1,0,0,0,0,48,0,0,32,48,0,0,
         65,48,0,0,106,48,0,0,-117,48,0,0,-76,48,0,0,-43,48,0,0,